indefatigable
American Heritage Dictionary:
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in·de·fat·i·ga·ble
(ĭn'dĭ-făt'ĭ-gə-bəl) 
adj.
Incapable or seemingly incapable of being fatigued; tireless. See synonyms at tireless.
indefatigably in'de·fat'i·ga·bly adv.
adj.
Incapable or seemingly incapable of being fatigued; tireless. See synonyms at tireless.
[Obsolete French indéfatigable, from Latin indēfatīgābilis : in-, not; see in-1 + dēfatīgāre, to tire out (dē-, intensive pref.; see de- + fatīgāre, to weary).]
indefatigability in'de·fat'i·ga·bil'i·ty or in'de·fat'i·ga·ble·ness n.indefatigably in'de·fat'i·ga·bly adv.
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indefatigable
Roget's Thesaurus:
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indefatigable
adjective
- Having or showing a capacity for protracted effort, regardless of difficulty or frustration: inexhaustible, tireless, unfailing, unflagging, untiring, unwearied, weariless. See continue/stop/pause, tired/fresh.
Antonyms by Answers.com:
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indefatigable
adj
Definition: untiring
Antonyms: fatigued, feeble, idle, tired, weary
Word Tutor:
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indefatigable
IN BRIEF: Untiring.
The optimism of a healthy mind is indefatigable.
— Margery Allingham (1904-1966), English detective story writer.
LearnThatWord.com is a free vocabulary and spelling program where you only pay for results!
Translations:
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Indefatigable
Dansk (Danish)
adj. - utrættelig
Nederlands (Dutch)
onvermoeibaar, onverdroten
Français (French)
adj. - inlassable, infatigable
Deutsch (German)
adj. - unermüdlich
Ελληνική (Greek)
adj. - άοκνος, ακούραστος, ακαταπόνητος
Italiano (Italian)
instancabile
Português (Portuguese)
adj. - incansável
Español (Spanish)
adj. - infatigable, incansable
Svenska (Swedish)
adj. - outtröttlig, oförtruten
中文（简体）(Chinese (Simplified))
不知疲倦的, 不屈不挠的, 有耐性的
中文（繁體）(Chinese (Traditional))
adj. - 不知疲倦的, 不屈不撓的, 有耐性的
한국어 (Korean)
adj. - 지칠 줄 모르는, 불굴의
日本語 (Japanese)
adj. - 疲れを知らない, 疲れない
العربيه (Arabic)
(صفه) لا يتعب
עברית (Hebrew)
adj. - שאינו מתעייף
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Copyrights:
American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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Roget's Thesaurus
Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary Copyright © 1995 byHoughton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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